EP1548136B1 - Sinterkarbideinsatz und Method zu dessen Herstellung. - Google Patents

Sinterkarbideinsatz und Method zu dessen Herstellung. Download PDF

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Publication number
EP1548136B1
EP1548136B1 EP04445125A EP04445125A EP1548136B1 EP 1548136 B1 EP1548136 B1 EP 1548136B1 EP 04445125 A EP04445125 A EP 04445125A EP 04445125 A EP04445125 A EP 04445125A EP 1548136 B1 EP1548136 B1 EP 1548136B1
Authority
EP
European Patent Office
Prior art keywords
cemented carbide
content
surface portion
tool according
grain size
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP04445125A
Other languages
English (en)
French (fr)
Other versions
EP1548136A1 (de
Inventor
Marianne Collin
Susanne Norgren
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sandvik Intellectual Property AB
Original Assignee
Sandvik Intellectual Property AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from SE0303360A external-priority patent/SE526601C2/sv
Priority claimed from SE0303487A external-priority patent/SE0303487D0/xx
Application filed by Sandvik Intellectual Property AB filed Critical Sandvik Intellectual Property AB
Publication of EP1548136A1 publication Critical patent/EP1548136A1/de
Application granted granted Critical
Publication of EP1548136B1 publication Critical patent/EP1548136B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/05—Mixtures of metal powder with non-metallic powder
    • C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
    • C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
    • C22C29/08—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on tungsten carbide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F2005/002—Tools other than cutting tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y10T428/12021—All metal or with adjacent metals having metal particles having composition or density gradient or differential porosity
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
    • Y10T428/264—Up to 3 mils
    • Y10T428/265—1 mil or less
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/30—Self-sustaining carbon mass or layer with impregnant or other layer

Definitions

  • the grain size, as well as the binder phase (e.g., cobalt) content each has an influence on the performance of the composite.
  • a smaller or finer grain size of the tungsten carbide results in a more wear resistant material.
  • An increase in cobalt content typically leads to an increase in toughness.
  • the binder phase content of the surface portion is ⁇ 1, preferably ⁇ 0.92, more preferably ⁇ 0.85, of the binder phase content in the interior portion and the WC grain size of the surface portion is ⁇ 1, preferably ⁇ 0.9, more preferably ⁇ 0.8, of the WC grain size in the interior portion.
  • the composition of the cemented carbide is WC+Co with a binder phase content >1.5 wt-%, preferably >5 wt-%, but ⁇ 25 wt-%, preferably ⁇ 15 wt-%.
  • All these embodiments can contain grain refiners such as VC and Cr 3 C 2 .
  • the carbon content of the cemented carbide compact shall be determined out of consideration for the carbon contribution from the applied chromium carbide.
  • the chromium solubility in the ⁇ -phase has to be compensated for.
  • compacts that would result in an eta-phase containing microstructure can be used.
  • the sintering shall be performed for optimal time to obtain the desired structure and a body with closed porosity, preferably a dense body. This time depends on the grain size of WC and the composition of the cemented carbide and can therefore not be closer defined. It is within the purview of the person skilled in the art to determine whether the requisite structure has been obtained and to modify the sintering conditions in accordance with the present specification. If necessary the body can be post-HIP-ed at a lower HIP-temperature compared to the sintering temperature and at a pressure of 1-100 MPa.
  • HV3 100 ⁇ m from the edge 1750 HV3 4 mm from the edge 1480 Co-content 100 ⁇ m from the edge, wt-% 9.0 Co-content 4 mm from the edge, wt-% 10.5 Cr-content 100 ⁇ m from the edge, wt-% 0.5 Cr-content 4 mm from the edge, wt-% 0.1 WC grain size 100 ⁇ m from the edge, ⁇ m 0.32 WC grain size 4 mm from the edge, ⁇ m 0.58

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Ceramic Products (AREA)
  • Metal Extraction Processes (AREA)

Claims (11)

  1. Hartmetallwerkzeug für die spanende Metallbearbeitung oder die Metallumformung, welches harte Bestandteile aus Wolframcarbid (WC) in einer Binderphase aus Co und/oder Ni umfaßt und wenigstens einen Oberflächenanteil und einen inneren Anteil aufweist, wobei
    die Korngröße der harten Bestandteile aus WC in dem Oberflächenanteil geringer ist als in dem inneren Anteil,
    der Binderphasengehalt in dem Oberflächenanteil niedriger ist als in dem inneren Anteil und
    der Chromgehalt in dem Oberflächenanteil höher ist als in dem inneren Anteil.
  2. Hartmetallwerkzeug nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß der Binderphasengehalt des Oberflächenanteils <1, vorzugsweise <0,92, besonders bevorzugt <0,85 von demjenigen in dem inneren Anteil ist.
  3. Hartmetallwerkzeug nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß die WC-Korngröße des Oberflächenanteils <1, vorzugsweise <0,9, besonders bevorzugt <0,8 von demjenigen in dem inneren Anteil ist.
  4. Hartmetallwerkzeug nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß der Oberflächenanteil Cr enthält, so daß das Verhältnis zwischen dem Parameter A = ((Gew.-% Cr/Gew.-% Binderphase) + 0,01) in dem Oberflächenanteil und dem Parameter B = ((Gew.-% Cr/Gew.% Binderphase) + 0,01), entnommen an dem Teil des Körpers, der durch den geringsten Cr-Gehalt gekennzeichnet ist, A/B >1,5, vorzugsweise A/B >3,0 ist.
  5. Hartmetallwerkzeug nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß der Oberflächenanteil bis zu 2000 µm, vorzugsweise 5-1200 µm, bevorzugter 10-800 µm, besonders bevorzugt 10-300 µm dick ist.
  6. Hartmetallwerkzeug nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß die Zusammensetzung des Hartmetalls WC+Co mit einem Binderphasengehalt >1,5 Gew.-%, vorzugsweise >5 Gew.-%, aber <25 Gew.-%, vorzugsweise <15 Gew.-%, ist.
  7. Hartmetallwerkzeug nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Zusammensetzung des Hartmetalls WC+Co mit einem Binderphasengehalt >1,5 Gew.-%, vorzugsweise >5 Gew.-%, aber <25 Gew.%, vorzugsweise <15 Gew.-%, und mit einem Gamma-Phasengehalt von 0-30, vorzugsweise 0,2-16 Vol.-% ist.
  8. Hartmetallwerkzeug nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß das Werkzeug ein Schneidwerkzeugeinsatz ist.
  9. Hartmetallwerkzeug nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß das Werkzeug ein Kaltformungswerkzeug ist.
  10. Hartmetallwerkzeug nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß es eine verschleißbeständige Beschichtung aufweist.
  11. Verfahren zur Herstellung eines Hartmetallwerkzeuges nach einem der vorangegangenen Ansprüche mit den nachfolgenden Stufen:
    - Bereitstellen eines Preßkörpers aus Hartmetall aus einem einzelnen Pulver;
    - gegebenenfalls Vorsintern des Preßkörpers und Schleifen desselben zu einer gewünschten Form und Größe;
    - Plazieren eines Pulvers aus Kornverfeinerer, welcher Kohlenstoff und/oder Stickstoff enthält, auf wenigstens einem Anteil der freiliegenden Oberfläche des Preßkörpers/vorgesinterten Rohlings, vorzugweise Cr enthaltend;
    - Sintern des Preßkörpers/vorgesinterten Rohlings und des Kornverfeinererpulvers, so daß der Kornverfeinerer in Richtung der Mitte des Körpers diffundiert, wobei von der freiliegenden Oberfläche aus, auf der der Kornverfeinerer plaziert war, nach innen eine Oberflächenzone gebildet wird und eine innere Zone gebildet wird;
    - gegebenenfalls Aufgeben eines isostatischen Gasdrucks während der finalen Sinterstufe, um einen dichten Körper zu erhalten;
    - gegebenenfalls nachträgliche HIP-Behandlung bei einer Temperatur unterhalb der Sintertemperatur und bei einem Druck von 1-100 MPa;
    - gegebenenfalls Schleifen zu einer endgültigen Form;
    - gegebenenfalls Abscheiden einer verschleißbeständigen Beschichtung;
    - gekennzeichnet dadurch, daß das Sintern für einen solchen Zeitraum durchgeführt wird, daß ein dichter Körper mit einem Oberflächenanteil mit einer kleineren Korngröße und einem geringeren Kobaltgehalt als in dem inneren Anteil erhalten wird.
EP04445125A 2003-12-15 2004-12-08 Sinterkarbideinsatz und Method zu dessen Herstellung. Not-in-force EP1548136B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE0303360 2003-12-15
SE0303360A SE526601C2 (sv) 2003-12-15 2003-12-15 Hårdmetallskär och sätt att tillverka detsamma
SE0303487 2003-12-22
SE0303487A SE0303487D0 (sv) 2003-12-22 2003-12-22 Cemented carbide tool for wire drawing and other cold forming operations and making the same

Publications (2)

Publication Number Publication Date
EP1548136A1 EP1548136A1 (de) 2005-06-29
EP1548136B1 true EP1548136B1 (de) 2008-03-19

Family

ID=34555024

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04445125A Not-in-force EP1548136B1 (de) 2003-12-15 2004-12-08 Sinterkarbideinsatz und Method zu dessen Herstellung.

Country Status (10)

Country Link
US (2) US7449043B2 (de)
EP (1) EP1548136B1 (de)
JP (1) JP2005177981A (de)
KR (2) KR20050060024A (de)
CN (1) CN1636654B (de)
AT (1) ATE389737T1 (de)
DE (1) DE602004012521T8 (de)
ES (1) ES2301959T3 (de)
IL (1) IL165665A0 (de)
PT (1) PT1548136E (de)

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Publication number Priority date Publication date Assignee Title
US9394592B2 (en) 2009-02-27 2016-07-19 Element Six Gmbh Hard-metal body

Also Published As

Publication number Publication date
US7708936B2 (en) 2010-05-04
KR20050060024A (ko) 2005-06-21
DE602004012521D1 (de) 2008-04-30
ATE389737T1 (de) 2008-04-15
CN1636654A (zh) 2005-07-13
JP2005177981A (ja) 2005-07-07
KR20120070550A (ko) 2012-06-29
DE602004012521T2 (de) 2009-05-07
CN1636654B (zh) 2011-09-21
PT1548136E (pt) 2008-06-12
ES2301959T3 (es) 2008-07-01
US20050129951A1 (en) 2005-06-16
US7449043B2 (en) 2008-11-11
DE602004012521T8 (de) 2009-08-13
IL165665A0 (en) 2006-01-15
EP1548136A1 (de) 2005-06-29
US20090110817A1 (en) 2009-04-30

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